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Over 439 Million Years ago over 86% of the world's Population was wiped out. Scientists believe it was due to Glaciation and Falling Sea Levels.
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Scientists estimate that over 364 Million Years ago the World lost 75% of its Population. Giant land plants were thought to have caused this extinction as their deep roots released nutrients into the oceans. This nutrient rich water drained the water of oxygen killing everything that needed water to live.
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This extinction occurred over 251 Million years ago leaving over 96% of the world's population dead. This extinction was caused by an enormous Volcanic Eruption that wiped out almost everything in its path.
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This extinction happened between 199-214 Million years ago and wiped out several species of Jurassic dinosaurs and other species living in that timeframe. This extinction was caused by asteroid impact as said by many scientists.
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This was the end of the Jurassic creatures known as the Dinosaurs. They were killed by a number of things including Volcanic activity, Asteroid impact, and Climate change. This happened over 65 million years ago on the earth.
